PROBLEM TO BE SOLVED: To provide oral medicines that is easy to confirm a drug compliance.SOLUTION: Provided is an oral medicine comprising a pharmaceutically active ingredient, and a pharmacologically acceptable compound that is at least one tag compound selected from the group consisting of compounds in which the compound or its metabolite is excreted in secretion, excrement, and body fluid of the user of the compound, and the at least one tag compound is included in an amount capable of detecting the at least one tag compound or metabolite thereof contained in the secretion, excrement or body fluid of the user of the oral medicine.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】服薬履行の確認が容易な経口医薬の提供。【解決手段】薬効成分と、薬理的に許容される化合物であって該化合物の服用者の分泌物、排泄物或いは体液に上記化合物或いはその代謝物が排出される化合物からなる群から選択された少なくとも1種のタグ化合物とを含む経口医薬であって、上記1種以上のタグ化合物が、上記経口医薬の服用者の分泌物、排泄物或いは体液に含まれている上記1種以上のタグ化合物或いはその代謝物を検出することができる量で含まれている経口医薬。【選択図】なし